Sorry Nige but the 'trigger' isnt aircraft in this case, its how many sim hours can be consumed and at the present time it isnt even close. The utilisation could be less of an issue if a 3rd party provider should wish to take the risk of selling spare sim capacity to for instance, NATO crews. That option is very much alive....I believe. Incidentally, the sim costs in the USA are incredibly cheap, making the BC for a UK sim even harder to get past the first post.